Long draft drawing roll



Oct. 3, 1944. BESWICK LONG DRAFT DRAWING ROLL Filed Jan. 2,1943 2 Sheets-Sheet l INVENTOR WI'LLI M B?WICK BY 'ATTORNEj Oct-3, 1944. w. BESWICK LONG DRAFT DRAWlNG ROLL Filed Jan. 2, 1943 2 Sheets-Sheet 2 QUE INVENTOR WILL! 51.

M BQS'WICK.

ATTOR E Patented Oct. 3, 1944 UNITED STATES PATENT OFFICE LONG DRAFT DRAWING ROLL William Beswick, Birmingham, Ala.

Application January 2, 1943, Serial No. 471,104

7 Claims.

My invention relates to drawing apparatus for attenuating machines in textile mills, such as the drawing, slubbing, intermediate and spinning frames, and has for an object the provision of apparatus of the character designated which shall be simple of design and operation, and capable of efiecting an even drawing of the roving with a greater ratio of speed between the front and rear rolls than has heretofore been the practice.

In my previously filed application, Serial No. 457,277, filed September 4, 1942, there is shown, described, and claimed an attenuating apparatus in which a plurality of single drawing rolls are caused to cooperate with closely adjacent concentric troughs, with ridges between the adjacent troughs, over which the roving is drawn and in which the proper pressure between'the rolls and the troughs may be obtained by adjusting the troughs with relation to their cooperating rolls. It is the principal object of this invention to obtain all the benefits of the invention of my application aforesaid, without the possibility of hanging, bunching, or snarling of the fiber.

In accordance with my present invention, I employ the single drawing rolls, and, in addition to the concentri troughs, I provide relatively small, light weight rolls which cooperate with the troughs and the drawing rolls to effect an even travel of the roving through the apparatus without bunching or snarling. The small rolls do not interfere with the drawing operation effected by the single drawing rolls and troughs. In one form of my invention I may dispense with the concentric troughs and. substitute therefor a plurality of relatively small rolls which cooperate with each drawing roll in a manner to cause the roving to be continuously drawn, as with the concentric troughs. In all embodiments of my invention the rolls may be spaced closely adjacent, or much closer than the length of staple or fiber from which the yarn is being spun, and the fibers are evenly drawn by the single drawing rolls, none being drawn out of turn.

Apparatus embodying features of my invention is illustrated in the accompanying drawings forming a part of this application in which Fig. 1 is a front elevational view showing one form of my invention, with certain parts removed;

Fig. 2 is an end elevational view of the same;

Fig. 3 is a sectional View taken along the line IIIIII of Fig. 1;

Fig. 4 is a view similar to Fig. 3 showing? modified form of my invention;

Fig. 5 is a detailed sectional view showing means for applying a slight pressure to the bottom rolls shown in Fig. 4; and

Fig. 6 is a sectional view similar to Fi 3 showing a further modified form of my invention,

Referring to the drawings, I show roll stands I0 and II in which the rolls are supported. Mounted on the roll stands are front bearing supports I3 and I4 and rear bearing supports I6. Between the bearing supports I4 and I6 are intermediate supports I1, I8, and I9. All of the bearing supports are adjustably mounted on the roll stands and are slideable with respect to each other. When in adjusted position they are held in place by means of bolts 2| and 22 which ass through the bearing supports and into the roll stands. Mounted in the bearing support I4 is a lower metal fluted roll 23. Cooperating with the roll 23 is an upper covered roll 24. At the rear, in bearing support I6, there is mounted a lower metal fluted roll 26. Cooperating with the roll 26 is a covered roll 21. The rolls 24 and 21 are preferably weighted as by means of a saddle 28, bridle 29, and weighted lever 3I.

Interposed between the front and rear roll assemblies just described are intermediate drawing rolls 32, 33, and 34 which are mounted in the bearing supports I1, I8, and I9, respectively. These rolls are preferably fluted metal rolls, though it will be understood my invention is not to be limited to any particular type of drawing roll. Mounted over the drawing rolls 32, 33, and 34, and extending from end to end of the entire assembly is a plate 36 having formed therein concentric troughs 31, 38, and 39 with which the rolls 32, 33, and 34, respectively, cooperate. The plate 36 is supported from front and rear bearing supports I3, I4, and I6 as shown in Fig. 2 by means of angles. M and 42 secured to the bearing supports. Adjusting screws 43 extend through the angles into the plate 36 whereby its position may be adjusted vertically with respect to the rolls 32, 33, and 34. The plate 36 may be made of any suitable material capable of being accurately shaped as described. For example, it may be pressed metal or molded plastic or glass.

It will be noted that each of the troughs 31, 38, and 39 defines, in cross section, slightly less than a semi-circle, so that the centers of the rolls 32, 33, and 34 are-below the sides of the troughs. It will further be noted, by reference to Fig. 3, that there is a considerable space between the back rolls 26 and 21 and the first intermediate roll 34, the plate 36 defining a flat surface be-' tween said rolls under which the roving is drawn.

intermediate roll 32.

This spacing is to provide for a break draft, or

slight loosening of the twist in the roving, and

plated, in accordance with my invention, that the principal part of the drawing takes place as the roving is passing under said ridges.

Mounted over the intermediate rolls 32, 33,

and 34, respectively, are relatively small metal rolls 41, 48, and 49. The rolls 41, 48, and 49 are mounted in adjustable bearings 5|, 52, and 53 which are adjustably mounted on a rod 54, which in turn is adjustably mounted in a hinged support 56 at the back of the assembly. The small rolls 41, 48 and 49 protrude through suitable slots formed in the troughs 31, 38, and 39 to cooperate with the intermediate drawing rolls 32, 33, and 34. Th small rolls are not weighted and bear only by their own weight on the fluted rolls 32', 33, and 34. The function of the small rolls is to prevent bunching or snarling of the fibers in the roving and to insure its continuous passage through the assembly.

The operation of the apparatus so far described is as follows:

The roving indicated by the letter R in Fig. 3 enters between th back rolls 26 and 21 through a trumpet 51. It passes under the flat surface of the plate 36 between the back rolls 26 and 21 and drawing roll 34 which, being a distance slightly greater than the length of the fibers in the roving, permits a break draft or slightloosening of the twist, and facilitates the further drawing of the roving. The roving then passes successively over the fluted rolls 34, 33, and 32, in the order named, and out between the front rolls 23 and 24. It will be understood that the rolls are driven at progressively increasing speeds from back to front, in a. manner well understood, and which is not shown in the drawings. For example, the ratio of speed of the roll 34 to rolls 26 and 21 may be the usual break draft of 1.00 to 1.15 to 1.25. The ratio of speed of rolls 34 and 33 may be 1.00 to 3.00 to 4 .00; and the ratio of the speed of rolls 32 to 33 may be 1.00

to 5.00- to 6.00. The ratio ofthe speed of the front. pair of rolls 23 and 24 to the roll 32- should be only enough tomaintain tension in the roving, as the drawing has already been completed by the time the roving leaves the means of my invention, the roving is in engagement with each of the fluted intermediate rolls for a distance equal to one-half the circumference of the roll and a partial drawing may occur for the entire distance the roving is in engagement with a roll. It appears. however, that the principal part Of the drawing takes place as the rovmg is passing under the ridges 44 and 45. 'Plac- ;ing the centers of the rolls 32, 33, and 34 below the ridges 44 and 46 provides for easier threading of the rovingthrough the rolls, while the relatively small rolls 41, 48, and 49 prevent any bunching or snarling of the fibers in the roving in the troughs. x

Referring to Fig. 4, I show a modified form of my invention. In this modification the front rolls 23. and 24 and the back rolls 26 and 21 are mounted the same as hereinbefore described and the intermediate rolls.

Itrwill be seen that by spond to the ridges 44 and 46 in Fig. 3, and pro-' vide a surface over which the roving is drawn by It will be noted that the ridges 62 and 63 extend to a plane slightly below the plane joining the centers of the intermediate rolls 32, 33, and 34, thereby providing for the easy threading of the roving through the rolls.

In accordance with this modification, I mount relatively small rolls 65, 64. and 66 beneath the plate 58, which rolls project through suitable longitudinal slots formed in the plate to cooperate with the intermediate rolls 32, 33, and 34, and prevent bunching and snarling of thefibers in the roving as it is being drawn. In order to overcome the force of gravity and provide slight pressure on the small rolls 65, 64, and 66, I mount beneath each of said rolls one or more springs 61 each of which bears at its lower end against a platefifi beneath the rolls, and carries on its upper end a bearing 69 which bears against the neck H of its associated roll to exert upward pressure against the roll and hold it in engagement with its associated intermediate roll. Only enough pressure is exerted by the spring '61 to insure sufiicient pressure on the roving to prevent its bunching and snarling. In order to prevent displacement of the spring 61 I provide a cup shaped holder 12, at the lower end, which is seecured to the plate 68, and a cup shaped holder 13, at the upper end, which is secured to the bearing 69.

In Fig. 6 I show a still further modified form of my invention. In accordance with this modification, instead of the concentric troughs and small. rolls cooperating with the intermediate rolls as hereinbefore described, I provide a plurality of much smaller rolls to cooperate with each of the intermediate rolls, thus providing a plurality of points of engagement for the roving with each of the drawing rolls. For example, I showthree small rolls 14, 16, and 11 cooperating with intermediate roll 32; three small rolls 18, 19, and 8| cooperating with intermediate roll 33 and three small rolls 82, 83; and 84 cooperating with intermediate roll 34; It is contemplated that in accordance with this modification, the center roll of each group, that is rolls 16, 19, and ,83, will be mounted in a bearing similar to bearings 5|, 52, and 53 shown in Fig. 2, and that the companion rolls in each group will be linked tothe middle roll as shown in Fig. 6. It will be obvious that, if desired, eachof said rolls may be mounted in an independent bearing. In accordance with this modification, a slight pressure slight downward pressure on the saddle 88 and the rolls 1'! and BI.

The operation of the. modifications described 7 is substantially the same as that described in connection with Figs. 1 to 3, inclusive. The relative speeds of the rolls are the same as heretofore described and the drawing action is substantially the same. In all modifications, it will be seen that I provide a maximum area of engagement of the drawing rolls with the roving.

While I have shown my invention in several forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are specifically set forth in the appended claims.

What I claim is:

1. In apparatus of the character described, a plurality of rolls driven at progressively increasing speeds, concentric troughs disposed in closely spaced relation to the rolls, means forming ridges between the troughs extending substantially to a plane passing the center of the rolls, means to pass roving progressively over the ridges and between the troughs and the rolls, and a plurality of relatively small rolls associated with the troughs, each being mounted to project through the bottom of a trough to cooperate with the associated first mentioned roll and prevent bunching or snarling of the roving.

2. In apparatus of the character described, a fluted roll, a trough in which a substantial portion of the roll rotates and disposed in spaced relation with respect to the roll, said trough having an elongated slot in the bottom thereof, means to pass roving transversely of and between the roll and the trough, and a relatively small r011 disposed to project through the slot and bear against the roving with suificient pressure only to insure its even movement in the direction of rotation of the fluted roll without bunching or snarling.

3. In apparatus of the character described, a series of fluted rolls driven at progressively increasing speeds, a series of troughs in which substantial portions of the rolls rotate, and disposed in closely spaced relation with respect to the rolls, each of said troughs having an elongated slot in the bottom thereof, means to pass roving transversely of the rolls between the rolls and the troughs, and a series of relatively small rolls associated with the troughs, each of said small rolls being mounted to project through a slot and bear against the roving with sufficient pressure only to insure its even movement in the direction of rotation of the fluted roll without bunching or snarling.

4. In apparatus of the character described, a series of fluted rolls driven at progressively increasing speeds, a plate spanning the rolls and adjustably mounted with respect thereto, a series of troughs formed in the plate and fitting about the rolls, a substantial portion of each of the rolls extending into its associated trough, each of said troughs having an elongated slot in the bottom thereof, means to pass roving progressively through the apparatus between the rolls and the troughs, and a series of relatively small rolls mounted to project through the slots and bear against the fluted rolls with sufficient pressure only to insure even movement of the roving in the direction of rotation of th fluted rolls without bunching or snarling.

5. In apparatus of the character described, a series of fluted rolls driven at progressively increasing speeds, a plate spanning the rolls and formed to provide a series of troughs cooperatagainst the roving with sufficient pressure only to insure its even movement in the direction of rotation of the fluted roll without bunching or snarling.

6. Apparatus as defined in claim 5 in which the plate member is mounted over the fluted rolls and the relatively small roll bears its own weight on the roving.

7. Apparatus as defined in claim 5 in which the plate member is mounted beneath the fluted rolls and each of the relativel small rolls is mounted to project upwardly through the slot in its associated trough, and spring means for exerting pressure on each of the relatively small rolls.

WILLIAM IBESWICK. 

